knave

n.

恶棍，无赖；（纸牌中的）杰克；

复数：knaves

1. He is a knave in grain.
   他是一个坏透了的人。
2. Knave is usually a person who brings trouble.
   一个无赖往往意味着他是一个带来麻烦的人。
3. He hid a knave of hearts in his pocket.
   他把一张红桃J 藏在口袋里。

Occupational Exposure to Electromagnetic Fields in Relation to Leukemia and Brain Tumors: A Case-Control Study in Sweden
Exposure to organic solvents. A cross-sectional epidemiologic investigation on occupationally exposed car and industrial spray paint...
Occupational exposure to electromagnetic fields in relation to leukemia and brain tumor. A case-control study in Sweden
Work with video display terminals among office employees. IV. Refraction, accommodation, convergence and binocular vision.
Long-term exposure to jet fuel. II. A cross-sectional epidemiologic investigation on occupationally exposed industrial workers with ...
Eye discomfort and work with visual display terminals.
Cancer in the electric power industry.
Long-term exposure to electric fields. A cross-sectional epidemiologic investigation of occupationally exposed workers in high-volta...
Electromagnetic fields and health outcomes.
Long-term exposure to jet fuel: an investigation on occupationally exposed workers with special reference to the nervous system